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Home › Gemstones › Untreated Gemstones

Untreated Gemstones

Browse our selection of untreated gemstones featuring natural color, clarity and beauty without enhancements.

Untreated Gemstones Weight
Untreated Gemstones Size
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Untreated Gemstones Treatment

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Yellow Untreated Gemstones
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13.23ct Pink Kunzite, Emerald Cut, VS
Kunzite Product Video (695861)

13.23ct Pink Kunzite, Emerald Cut, VS

14.3 x 11.2 mm

$ 329.43

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1.92ct Green Tourmaline, Oval, Transparent

1.92ct Green Tourmaline, Oval, Transparent

9 x 7 mm (calibrated)

$ 32.91

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15.83ct White Howlite, Cushion, Opaque

15.83ct White Howlite, Cushion, Opaque

23.5 x 16.8 mm

$ 7.41

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33.59ct Gray Hematite, Oval, Opaque

33.59ct Gray Hematite, Oval, Opaque

23.2 x 18 mm

$ 32.76

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3.96ctw Red Pyrope Garnet, Marquise, VVS-VS

3.96ctw Red Pyrope Garnet, Marquise, VVS-VS

12.1 x 6 mm

$ 39.18

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1.57ct Yellow Citrine, Emerald Cut, VVS

1.57ct Yellow Citrine, Emerald Cut, VVS

8 x 6 mm (calibrated)

$ 12.51

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3.74ct Yellow Citrine, Pear Shape, VVS-VS

3.74ct Yellow Citrine, Pear Shape, VVS-VS

12 x 10 mm (calibrated)

$ 23.47

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1.51ctw Green Demantoid Garnet, Oval, VS

1.51ctw Green Demantoid Garnet, Oval, VS

4.8 x 4 mm

$ 165.44

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2.21ct Yellow Cat'S Eye Opal, Oval, Opaque

2.21ct Yellow Cat'S Eye Opal, Oval, Opaque

9.5 x 6.7 mm

$ 6.61

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11.31ct Violet Amethyst, Cushion, VVS-VS

11.31ct Violet Amethyst, Cushion, VVS-VS

15 x 15 mm (calibrated)

$ 90.12

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2.11ct Orange Hessonite Garnet, Oval, VS-SI

2.11ct Orange Hessonite Garnet, Oval, VS-SI

9 x 7 mm (calibrated)

$ 46.23

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0.86ct Green Tourmaline, Baguette, VS

0.86ct Green Tourmaline, Baguette, VS

9 x 3.3 mm

$ 29.98

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0.91ct Green Chrome Diopside, Marquise, VS-SI

0.91ct Green Chrome Diopside, Marquise, VS-SI

10 x 5 mm (calibrated)

$ 22.66

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2.40ctw Green Tsavorite Garnet, Baguette, VS

2.40ctw Green Tsavorite Garnet, Baguette, VS

4 x 2 mm

$ 144.62

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3.48ctw Multicolor Labradorite, Round, Translucent

3.48ctw Multicolor Labradorite, Round, Translucent

7 mm (calibrated)

$ 8.46

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1.60ct Pink Morganite, Pear Shape, VVS-VS

1.60ct Pink Morganite, Pear Shape, VVS-VS

10.4 x 6.4 mm

$ 122.71

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1.96ct Orange Hessonite Garnet, Oval, VS-SI

1.96ct Orange Hessonite Garnet, Oval, VS-SI

9 x 7 mm (calibrated)

$ 42.94

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1.79ct Orange Hessonite Garnet, Square, VS-SI

1.79ct Orange Hessonite Garnet, Square, VS-SI

6.6 x 6.6 mm

$ 31.23

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0.90ctw Red Pyrope Garnet, Square, VS

0.90ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 6.91

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0.40ct Orange Sphalerite, Round, SI

0.40ct Orange Sphalerite, Round, SI

4 mm (calibrated)

$ 19.92

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0.34ct Yellow Color-Change Diaspore, Oval, VVS-VS

0.34ct Yellow Color-Change Diaspore, Oval, VVS-VS

4.5 x 4 mm

$ 17.94

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1.15ctw Red Pyrope Garnet, Pear Shape, VVS-VS

1.15ctw Red Pyrope Garnet, Pear Shape, VVS-VS

7 x 4.8 mm

$ 9.16

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31.20ctw Blue Chalcedony, Flower Cut, Translucent

31.20ctw Blue Chalcedony, Flower Cut, Translucent

15 x 15 mm (calibrated)

$ 31.08

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3.51ct Yellow Citrine, Pear Shape, VVS-VS

3.51ct Yellow Citrine, Pear Shape, VVS-VS

13.9 x 8.2 mm

$ 26.93

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Why Buy Untreated Gemstones from GemSelect?

Natural Untreated Gemstones

Our untreated gemstones are completely natural and have not undergone any enhancement processes. These gems display their original color and clarity as formed in nature, making them highly valued by collectors, jewelers, and gemstone enthusiasts.

Buy Untreated Gemstones Online

At GemSelect you can easily shop untreated gemstones online with confidence. Our inventory includes carefully sourced loose gemstones from around the world, with full transparency regarding treatments and gem origins.

Natural Untreated Loose Gemstones

Why Choose Untreated Gems?

Untreated gems are prized because they remain exactly as nature created them. Without heat or chemical treatments, these stones offer rarity and authenticity that many collectors and jewelry designers prefer.

Unheated Sapphire and Ruby

Some of the most sought-after untreated gemstones include unheated sapphire and ruby. These rare stones retain their natural color and are highly valued due to the absence of heat treatment commonly used to enhance corundum.

Gemstone Authenticity and Transparency

Every gemstone at GemSelect comes with clear treatment disclosure. When purchasing untreated stones, buyers can be confident they are receiving authentic gems that have not been altered by heat or other enhancement methods.

Untreated Gems for Custom Jewelry

Natural untreated gemstones are perfect for custom jewelry pieces. Their unique appearance ensures every ring, pendant, or pair of earrings features a one-of-a-kind gemstone created by nature.

Rare and Collectible Gemstones

Because many gemstones are routinely treated, truly untreated examples can be relatively rare. Collectors often seek untreated stones because they represent the most natural state of a gemstone.

Learn more about gemstone treatments and natural gem formation on our Gemstone Treatment Guide.

FAQs

What are untreated gemstones?

Untreated gemstones are natural gems that have not been enhanced with heat, chemicals, irradiation, or other treatments. They retain their original appearance as formed in nature.

Are untreated gemstones more valuable?

In many cases untreated gemstones are more valuable because they are rarer than treated stones. Natural color without enhancement is highly prized by collectors and investors.

How can I tell if a gemstone is untreated?

Gemstone treatment is typically determined through gemological testing. Reputable sellers like GemSelect clearly disclose whether a stone is untreated or has received any enhancements.

Which gemstones are commonly untreated?

Some gemstones frequently found untreated include garnet, spinel, peridot, and certain sapphires. However, many gem types may be treated depending on their origin and quality.

Are untreated gemstones suitable for jewelry?

Yes, untreated gemstones can be excellent for jewelry depending on their hardness and durability. Popular choices include sapphire, ruby, spinel, and garnet.

GemSelect Certified Store Reviews

GemSelect: Over 22 Years in the Gemstone Business! Thank you for trusting us with your purchase!

Overall Rating -> 10 star ratings

They have a wonderful selection of gems of all sorts, shapes, cuts, and quality. I am very particular about the quality of stones I buy, and found many with VVS clarity and excellent cut and polish. I am thrilled with each of the stones I purchased, and would definitely recommend GemSelect to everyone.

Posted By Debsarabs in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very large selection from affordable to high end I will be coming back to shop again!

Posted By GreenGator in August, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Always a good quality stone. Priced fairly and shipped promptly. Answers emails quickly

Posted By Ron T in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

good navigation and simple interface.

Posted By Dave in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

The citrine gems are beautiful. I appreciated that each stone was individually shown on the website so I could see exactly what I was getting. No mystery person selecting random stones for me. The documentation included with each gem was high quality as well. Great price and arrived as expected.

Posted By Jen in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I have purchased stones from gem select in the past and have been very satisfied. I expect to repeat that experience with this purchase as well

Posted By Marti in July, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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